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作者采用腹白指数作为测定糙米腹白的指标,对诸品种的腹白作了方差分析,结果表明品种间差异显著,并根据杂种后代中腹白表现,认为腹白是受微效多基因控制的数量性状,似存在部分显性作用。腹白指数与产量性状、叶片性状和粒型性状都有明显的相关性,与籽粒的灌浆速度也密切相关,一定程度上还受环境条件的影响。试验表明,选择多穗、多粒,叶片窄长略披,穗密度和熟期合适的品种,结合合理的栽培措施,使之前期灌浆速度缓、中期稳,后期快,可在提高产量的同时改善米质。
The author used the index of belly white index as the index to determine the degree of white belly of brown rice and conducted an analysis of variance on the belly white of the varieties. The results showed that there was significant difference among varieties, and according to the performance of belly white of hybrid offspring, Quantitative traits, there may be some dominance. Abdominal index and yield traits, leaf traits and grain traits have significant correlation with grain filling rate is also closely related to a certain extent, also affected by environmental conditions. The results showed that the selection of more spikes, more grains, narrow and long leaves of spikes, spike density and maturity of the appropriate varieties, combined with reasonable cultivation measures, so that early grain filling slow, medium and fast late, can increase production Improve the quality of rice.